Aquarium filter bag



FIG. 1 is a perspective view thereof, taken from the top;

FIG. 2 is a side elevational view, the opposite side is a mirror image;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof, and,

FIG. 6 is a bottom view thereof. 

The ornamental design for an aquarium filter bag, as shown and described. 